/** Base64 encode / decode   http://www.webtoolkit.info   **/
// private property
//var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
// Warning! this is modified base64 codekey
var _keyStr = "abcdefghijkml012345nopqrstuvwxyz6789ABCDEFGHIJKLMNOPQRSTUVWXYZ+/=";
// public method for encoding
function _Base64_encode(input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = _Base64_utf8_encode(input);
while (i < input.length) {
	chr1 = input.charCodeAt(i++);
	chr2 = input.charCodeAt(i++);
	chr3 = input.charCodeAt(i++);

	enc1 = chr1 >> 2;
	enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
	enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
	enc4 = chr3 & 63;

	if (isNaN(chr2)) {
		enc3 = enc4 = 64;
	} else if (isNaN(chr3)) {
		enc4 = 64;
	}

	output = output +
	this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
	this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
}

// public method for decoding
function _Base64_decode(input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;

input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

while (i < input.length) {

	enc1 = this._keyStr.indexOf(input.charAt(i++));
	enc2 = this._keyStr.indexOf(input.charAt(i++));
	enc3 = this._keyStr.indexOf(input.charAt(i++));
	enc4 = this._keyStr.indexOf(input.charAt(i++));

	chr1 = (enc1 << 2) | (enc2 >> 4);
	chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
	chr3 = ((enc3 & 3) << 6) | enc4;

	output = output + String.fromCharCode(chr1);

	if (enc3 != 64) {
		output = output + String.fromCharCode(chr2);
	}
	if (enc4 != 64) {
		output = output + String.fromCharCode(chr3);
	}

}
output = _Base64_utf8_decode(output);
return output;
}

// private method for UTF-8 encoding
function _Base64_utf8_encode(string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";

for (var n = 0; n < string.length; n++) {

	var c = string.charCodeAt(n);

	if (c < 128) {
		utftext += String.fromCharCode(c);
	}
	else if((c > 127) && (c < 2048)) {
		utftext += String.fromCharCode((c >> 6) | 192);
		utftext += String.fromCharCode((c & 63) | 128);
	}
	else {
		utftext += String.fromCharCode((c >> 12) | 224);
		utftext += String.fromCharCode(((c >> 6) & 63) | 128);
		utftext += String.fromCharCode((c & 63) | 128);
	}
}
return utftext;
}

// private method for UTF-8 decoding
function _Base64_utf8_decode(utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {

	c = utftext.charCodeAt(i);
	if (c < 128) {
		string += String.fromCharCode(c);
		i++;
	}
	else if((c > 191) && (c < 224)) {
		c2 = utftext.charCodeAt(i+1);
		string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
		i += 2;
	}
	else {
		c2 = utftext.charCodeAt(i+1);
		c3 = utftext.charCodeAt(i+2);
		string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
		i += 3;
	}
}
return string;
}